Counter circuit used to switch an encoder chip - Page 5 - Electronic Circuits Projects Diagrams Free

ericgibbs · 10th October 2007, 09:16 AM

Hi Len ,Sean.

Quote:

I have a question about the interface with the computer. I know I am getting ahead of my self. Would it be possible to make is so that I can use the remote separately by pushing the buttons that I am using in this circuit. Then have it so that I can plug it into the parallel port and just have the "computer push the buttons"?

Lets know when you are ready to try the parport.

Len, I hope you are getting some rain 'down under'.

ljcox · 10th October 2007, 09:57 AM

Quote:

Originally Posted by ericgibbs

Len, I hope you are getting some rain 'down under'.

We had a few drops this arvo as I was working on installing our rain water tank. But it had stopped by the time I'd put the tools away.

**Nigel Goodwin** · 10th October 2007, 11:06 AM

Quote:

Originally Posted by ljcox

this arvo

How about a translation?

ericgibbs · 10th October 2007, 12:08 PM

Quote:

Originally Posted by Nigel Goodwin

How about a translation?

I googled ?

http://en.wikipedia.org/wiki/Arvo

0RESET0 · 10th October 2007, 06:01 PM

Quote:

Originally Posted by ericgibbs

Hi Len ,Sean.

Lets know when you are ready to try the parport.

I think I am getting close. Just have to get this prototype working and then figure out how to get it on a PCB. That will be a chore in it's self.

Sean

ljcox · 10th October 2007, 10:39 PM

Quote:

Originally Posted by Nigel Goodwin

How about a translation?

Nigel, you're obviously not schooled in Australianisms.

this arvo = this afternoon

**Nigel Goodwin** · 10th October 2007, 10:43 PM

Quote:

Originally Posted by ljcox

Nigel, you're obviously not schooled in Australianisms.

Schooled in it?, I couldn't even spell it!

ljcox · 10th October 2007, 10:52 PM

Quote:

Originally Posted by 0RESET0

I think I am getting close. Just have to get this prototype working and then figure out how to get it on a PCB. That will be a chore in it's self.

Sean

I suggest you keep it in the prototype form if you also want to interface it to your laptop. The interfacing will require at least one more IC.

We need to understand exactly what you want and how far the unit will be located from the laptop.

My understanding is that you want to be able to press a key on the laptop and have it advance the counter in the unit as if you pressed the "up" button on the unit. Then press another button to initiate the transmission, ie. to the fire the cracker.

Incidentally, I'm puzzled as to why you need the counter to be able to count down. I would have thought that you would only need it to count up.

I'm also puzzled as to why you need the "unit" if you're intending to use the laptop. Why not interface the laptop directly to the Tx? (the laptop can do the counting)

Then make a PCB once you have it all working.

0RESET0 · 11th October 2007, 02:35 AM

Quote:

Originally Posted by ljcox

I suggest you keep it in the prototype form if you also want to interface it to your laptop. The interfacing will require at least one more IC.

We need to understand exactly what you want and how far the unit will be located from the laptop.

My understanding is that you want to be able to press a key on the laptop and have it advance the counter in the unit as if you pressed the "up" button on the unit. Then press another button to initiate the transmission, ie. to the fire the cracker. I would actually like to have a program do everything for me. I would like to be able to call up a sequence, press enter to initiate it and have the computer change the code of the Tx, fire the Tx then count to the next event and repeat the process.

Incidentally, I'm puzzled as to why you need the counter to be able to count down. I would have thought that you would only need it to count up.
I need down in case some thing doesn't fire and I have to go back. I could just reset and count back up to it but that would take too long.

I'm also puzzled as to why you need the "unit" if you're intending to use the laptop. Why not interface the laptop directly to the Tx? (the laptop can do the counting)
I do intend on using a laptop but I would also like to use the unit seperatly. would it not also be easier to write the program if it only has to do three things; count, up, fire, count... etc.

Then make a PCB once you have it all working.

Once again, I am on the fence about using the multiplexing. I am both trying to find the parts that I need to do the multiplexing and I am also looking for new displays. I think I may go with the multiplexing just because it will give me more experience. Will either way make it easier to connect the unit to the computer?

Sean

ljcox · 11th October 2007, 03:00 AM

I do intend on using a laptop but I would also like to use the unit seperatly. would it not also be easier to write the program if it only has to do three things; count, up, fire, count... etc.

Yes it should be little simpler than the full box & dice. Eric??

There is no interaction between the input side and the display side. So it is irrelevant whether you multiplex or not.

ljcox · 11th October 2007, 03:04 AM

I forgot to comment on this:-

I would actually like to have a program do everything for me. I would like to be able to call up a sequence, press enter to initiate it and have the computer change the code of the Tx, fire the Tx then count to the next event and repeat the process.

I can help you with the interface, it would only need 3 or 4 ICs; but I don't have any PC Programming knowledge.

ericgibbs · 11th October 2007, 08:12 AM

Quote:

Originally Posted by ljcox

I do intend on using a laptop but I would also like to use the unit seperatly. would it not also be easier to write the program if it only has to do three things; count, up, fire, count... etc.

Yes it should be little simpler than the full box & dice. Eric??

There is no interaction between the input side and the display side. So it is irrelevant whether you multiplex or not.

Gday Len,Sean,

Using a laptop to "only has to do three things; count, up, fire, count", is a wastful idea.

As Len suggests, go the hardware route, debug and get the project working first as stand alone system.
[ I understand you have fireworks demo in the near future?]

Using the experience you gain on operating the system,
come back to us and we will help with a PC parallel port interface to the system.

Regards.

0RESET0 · 15th October 2007, 12:31 AM

Alright, I will refrain from thinking about the interface until I have gotten this unit working. I was only trying to make sure that no part of the current circuit would make a difference when we finally started the interface.

I have not had a chance to pick up any parts yet. I was going to have next week off but will now be working. This makes it hard to get to our local electronics store. I will try to pick up the parts this week and finally get the prototype finished.

Sean

ljcox · 15th October 2007, 07:21 AM

Quote:

Originally Posted by 0RESET0

Alright, I will refrain from thinking about the interface until I have gotten this unit working. I was only trying to make sure that no part of the current circuit would make a difference when we finally started the interface.

Sean

The computer interface will require another IC such as the 74LS06 or 74LS07.

ljcox · 15th October 2007, 11:38 PM

In my post yesterday, I forgot about the output interface, ie. the interface between the counters and the Tx.

You will need 2 more 74LS07 ICs for this.

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11th October 2007, 03:00 AM	(permalink)
ljcox	I do intend on using a laptop but I would also like to use the unit seperatly. would it not also be easier to write the program if it only has to do three things; count, up, fire, count... etc. Yes it should be little simpler than the full box & dice. Eric?? There is no interaction between the input side and the display side. So it is irrelevant whether you multiplex or not. __________________ Len

11th October 2007, 03:04 AM	(permalink)
ljcox	I forgot to comment on this:- I would actually like to have a program do everything for me. I would like to be able to call up a sequence, press enter to initiate it and have the computer change the code of the Tx, fire the Tx then count to the next event and repeat the process. I can help you with the interface, it would only need 3 or 4 ICs; but I don't have any PC Programming knowledge. __________________ Len

15th October 2007, 12:31 AM	(permalink)
0RESET0	Alright, I will refrain from thinking about the interface until I have gotten this unit working. I was only trying to make sure that no part of the current circuit would make a difference when we finally started the interface. I have not had a chance to pick up any parts yet. I was going to have next week off but will now be working. This makes it hard to get to our local electronics store. I will try to pick up the parts this week and finally get the prototype finished. Sean

15th October 2007, 11:38 PM	(permalink)
ljcox	In my post yesterday, I forgot about the output interface, ie. the interface between the counters and the Tx. You will need 2 more 74LS07 ICs for this. __________________ Len